Stall Warning Horn And Lift Detector; Lift Detector Removal; Lift Detector Installation - Piper PA-44-180 SEMINOLE Maintenance Manual

9 . While maintaining a light up pressure on the underside of the flap, check flap down travel m e a s u r i n g
from the neutral position obtained from Steps 6, 7 and 8. Flap deflection should be 10 ± 2 degrees at
first notch, 25 ± 2 degrees at second notch, and 40 ± 2 degrees at the third notch. Adjust the torque
tube stop screw in or out as required. After any screw adjustment, it will be necessary to review Steps
3 thru 9.
10. Check complete operation of the flaps, and handle and ratchet mechanism. Install all access covers
removed.
The flap adjustment must be complete before starting on aileron
adjustments.
STALL WARNING.

STALL WARNING HORN AND LIFT DETECTOR.

This system consists of two detectors which are electrically connected to the flap position switch and the
stall warning horn. Performed the following ground check to determine that the lift detectors are functioning
properly.
The lift detectors are located on the left wing. With the master switch ON gently lift the tabs on both lift
detectors; the stall warning horn should not sound. With the master switch still ON, activate the main gear
squat switch to simulate inflight conditions; extend the flaps to the 10° flap position. The 0° to 10° flap positions
relate only to the outboard lift sensor. Gently lift out the outboard sensor; the stall warning horn s h o u l d
sound. Lifting the inboard sensor should not sound the horn. With flaps positioned from 25° to 40° gently lift
the inboard sensor, the horn should sound. Lifting the outboard sensor should not sound the horn. With the
check completed return the flaps to the full up position, turn the master switch OFF and remove any items used
to activate the squat switch.
REMOVAL OF LIFT DETECTOR.
The master switch must be off prior to performing any work on
the lift detector. Place reference marks on holding plate and
wing skin for use when reinstalling.
1. Remove four screws holding the plate around the tab. The lift detector is fastened to this plate;
remove the unit from wing.
2. Mark the electrical wires and terminals to facilitate installation. Remove electrical wires from lift
detector: Remove lift detector from aircraft.
INSTALLATION OF LIFT DETECTOR.
1. Attach the electrical leads to the appropriate terminals of the lift detector.
2. Position the lift detector with its mounting plate on the wing determining that the sensor blade of the
unit drops down freely. and secure in position with the four screws previously removed.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— NOTE —
— NOTE —
1L23
27-60-00
Page 27-45
Revised: June 20, 1995